Fix another Werror failure on ubuntu 19.10
Fix another Werror failure on ubuntu 19.10

Signed-off-by: Gautam Venkataramanan <fca9671e678e239fce07722163c605b541ab1143@gmail.com>
Change-Id: Ic778c496597dc99be4f03d0757ec5a415a675a39

opendaylight/opflex,opendaylight/opflex,opendaylight/opflex,opendaylight/opflex